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Variance components and direct and maternal heritabilities were estimated for weight at birth (n=4960), weaning at 180 days (n=4250) and yearling at 365 days (n=3330) and preweaning average daily gain (n=4250). Data were from calves of purebred (Bos indicus) Boran, Barca and Horro and their crosses with Friesian, Jersey and Simmental breeds that were separated from their dams 1 day after birth and...
Groups of Menz (M), Corriedale Menz (CM), and Awassi Menz (AM; n = 41, 41 and 36, respectively) ewe lambs were studied between weaning and birth of their first lambs (sired by M rams) in the cool highlands of central-northern Ethiopia. Between age 6 and 13 months, the ewe lambs were run continuously with fertile M rams. Sixty-eight (58%) conceived, and neither age at first lambing (AFL; mean...
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